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Diffstat (limited to 'gallerycommon/src/com/android/gallery3d/exif/IfdData.java')
-rw-r--r--gallerycommon/src/com/android/gallery3d/exif/IfdData.java122
1 files changed, 122 insertions, 0 deletions
diff --git a/gallerycommon/src/com/android/gallery3d/exif/IfdData.java b/gallerycommon/src/com/android/gallery3d/exif/IfdData.java
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+++ b/gallerycommon/src/com/android/gallery3d/exif/IfdData.java
@@ -0,0 +1,122 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.gallery3d.exif;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * This class stores all the tags in an IFD.
+ *
+ * @see ExifData
+ * @see ExifTag
+ */
+class IfdData {
+
+ private final int mIfdId;
+ private final Map<Short, ExifTag> mExifTags = new HashMap<Short, ExifTag>();
+ private int mOffsetToNextIfd = 0;
+
+ /**
+ * Creates an IfdData with given IFD ID.
+ *
+ * @see IfdId#TYPE_IFD_0
+ * @see IfdId#TYPE_IFD_1
+ * @see IfdId#TYPE_IFD_EXIF
+ * @see IfdId#TYPE_IFD_GPS
+ * @see IfdId#TYPE_IFD_INTEROPERABILITY
+ */
+ public IfdData(int ifdId) {
+ mIfdId = ifdId;
+ }
+
+ /**
+ * Get a array the contains all {@link ExifTag} in this IFD.
+ */
+ public ExifTag[] getAllTags() {
+ return mExifTags.values().toArray(new ExifTag[mExifTags.size()]);
+ }
+
+ /**
+ * Gets the ID of this IFD.
+ *
+ * @see IfdId#TYPE_IFD_0
+ * @see IfdId#TYPE_IFD_1
+ * @see IfdId#TYPE_IFD_EXIF
+ * @see IfdId#TYPE_IFD_GPS
+ * @see IfdId#TYPE_IFD_INTEROPERABILITY
+ */
+ public int getId() {
+ return mIfdId;
+ }
+
+ /**
+ * Gets the {@link ExifTag} with given tag id. Return null if there is no such tag.
+ */
+ public ExifTag getTag(short tagId) {
+ return mExifTags.get(tagId);
+ }
+
+ /**
+ * Adds or replaces a {@link ExifTag}.
+ */
+ public void setTag(ExifTag tag) {
+ mExifTags.put(tag.getTagId(), tag);
+ }
+
+ /**
+ * Gets the tags count in the IFD.
+ */
+ public int getTagCount() {
+ return mExifTags.size();
+ }
+
+ /**
+ * Sets the offset of next IFD.
+ */
+ void setOffsetToNextIfd(int offset) {
+ mOffsetToNextIfd = offset;
+ }
+
+ /**
+ * Gets the offset of next IFD.
+ */
+ int getOffsetToNextIfd() {
+ return mOffsetToNextIfd;
+ }
+
+ /**
+ * Returns true if all tags in this two IFDs are equal. Note that tags of IFDs offset or
+ * thumbnail offset will be ignored.
+ */
+ @Override
+ public boolean equals(Object obj) {
+ if (obj instanceof IfdData) {
+ IfdData data = (IfdData) obj;
+ if (data.getId() == mIfdId && data.getTagCount() == getTagCount()) {
+ ExifTag[] tags = data.getAllTags();
+ for (ExifTag tag: tags) {
+ if (ExifTag.isOffsetTag(tag.getTagId())) continue;
+ ExifTag tag2 = mExifTags.get(tag.getTagId());
+ if (!tag.equals(tag2)) return false;
+ }
+ return true;
+ }
+ }
+ return false;
+ }
+} \ No newline at end of file